import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;

public class demo {
    public static void main(String[] args) throws SQLException {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入学号：");
        int id = scanner.nextInt();
        System.out.println("请输入姓名：");
        String name = scanner.next();
        //1.先创建DataSource
        DataSource dataSource = new MysqlDataSource();
        ((MysqlDataSource)dataSource).setURL("jdbc:mysql://127.0.0.1:3306/java109?characterEncoding=utf8&useSSL=false");
        ((MysqlDataSource)dataSource).setUser("root");
        ((MysqlDataSource)dataSource).setPassword("111111");
        //2.建立和数据库服务器之间的链接，连接好了之后才能进行后续的请求-响应交互
        Connection connection = dataSource.getConnection();
        //3.构造SQL
        //String sql = "insert into student values(1,'张三')";
        //String sql = "insert into student values("+id+",'"+name+"')";
        String sql = "insert into student values(?,?)";
        //String sql = "delete from student where id = 1";
       // String sql = "update student set name='李四' where id =1";
        PreparedStatement statement = connection.prepareStatement(sql);
        statement.setInt(1,id);
        statement.setString(2,name);
        System.out.println("sql = "+statement);

        //4.把数据发给服务器,返回值是一个整数，表示影响到的行数
        int n = statement.executeUpdate();
        System.out.println("n = "+n);
        //5.释放资源，关闭连接
        statement.close();
        connection.close();
    }
}
